Pump



Sept. 29, 1931. L B. KAPP 1,825,318

PUMP

Filed sept.v 24, 1925 2 sheets-sheet 1 INVENTOR Ea/WR@ B. /mPP w99; www

TTORNY L. B. KAPP Sept. 29, 1931.

PUMP

Filed Sept. 24, 1925 2 Sheets-Sheet 2 Patented Sept. 29, 1931 UNITEDSTATES 'PATENT OFFICE LEONARD B. KAPP, F BELOIT, WISCONSIN, .ASSIGNOR T0FAIRBANKS, MORSE & CO.,

OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS PUMP Application ledSeptember 24, 1923. Serial No. 664,513.

My invention relates to improvements in pumps.

TheV object of my invention is to Vprovide pumping means utilizing theperiodically varying pressure existing in the crank case `compartmentsof an internal combustion engine employing crank case compression.

Though `my invention consists largely 1n thel construction andarrangement of parts hereinafter described .and particularly pointed outin the claims, yet I do not limit my invention to the precise form,construction or arrangement of parts shown or the several parts thereof,inasmuch as various alterations may be made without departing from thescope of my invention.

In the drawings Fig. 1 is a fragmentary sectional view of an engineemploying one form of my invention for the purpose of `pumping oil fromthe crank-case thereof; Fig. 2 is a fragmentary sectional view of amodified form of my invention utilized for the same purpose as that inFig. 1; Fig. 3 is a fragmentary sectional view of another modificationof my i invention which may Ibe utilized for any pumping urposes.

Referring bynumerals to t e drawings, in Fig. 1 the cylinder` 2, piston3 and con- Y necting rod 4 of an internal combustion engine ofthetwo-cycle type maybe of any suitable form, and the engine providedwith a crank-case, the wall of which is shown at 5, and isfurtherprovidedwith the crank shaft 6vand crank 7 The crank shaft iscarried by a bearing 8, which may be of VThis collar, or air-stop ring,preferably turns with the crankshaft and is attached thereto Vby meansof lugs, 10, passing over i the cheeks of the crank 7, and preferablyheld by means'of dowels, 11. Springs, 12, serve to push the air-stopring 9,- against the inner surface of the crank case, 5, which ispreferably ground to form a bearing surface for the ring. An oil Voutletfor the crank case is shown at 13, connected by means of a suitableconduit, 14, to an opening, 15, covered by the air-stop ring, 9. A

l with opening 16, upon each revolution of the times by means of a shortgroove or channel, 18, which is preferably fcut in the bear ling surfaceof the air-stop ring. By regulatingthe size and position of this.channel or groove 18, the openings, 15 and 16, may be placed incommunication for any length of timeV and at any periodical timedesired. By regulating this communication period to some time when thepressure in the crank case is greater than that in the outlet 17,

oil` will bc forced from the crank case through the conduit 14,' opening15, chan- 70 nel 18, opening 16 into the outlet conduit 17 Vthusproviding an effective means for pumping lubricating oil outof the crankcase.

In Fig. 2 the air-stop ring 9, is preferably made larger incircumference so that its lower edge will come below the oil level inthe crank case. The channel 18, in the airstop ring is then preferablyVmade to eX- tend through the ring and registers periodically vdirectlywith the opening 13, inthe crank case. Conduit 17 serves as the outletfor this opening. If the position of the channel 18, through theair-stop ring, 9, is such that it registers with opening 13, when thecrankcase pressure is greater than that in the outlet 17, then oil willbe forced through the channel 18, opening 13, and into the outlet 17.

In Fig. 3 the air-stop ring is shown at 9. The channel 18, is made topass through the ring andin addition there is an opening or channel 19,preferably corresponding to the channel 18, but placed opposite to it.These openings, evidently, alternately coincide crank shaft 6. Outletconduit 17 from opening 16, is connected to a pulsation chamber, 20,preferably as shown, having an inlet, 21, inlet valve or valves22, ofyany suitable type, an outlet, 23, and outlet valves 24, of any suitabletype. Now if channel 18, be so placed that it registers periodicallywith opening 16, at some time when the crank case pressure is near amaximum, then channel 19, being oppositely disposed vith respect tochannel 18, will register periodically with opening 16, at some timewhen the ciank case pressure will be near a minimum. This will cause analternate suction and pressure to be applied to the pulsation chamber20, so that when channel 19, registers Vith opening 1G, Huid will betaken in at inlet 21, through valve 22, and when channel 18, registerswith opening 1G, fluid will bc forced out of outlet 23, through valve24.

Having described my invention what I claim as new and desire to obtainby Letters Patent is:

1. In an oil pump in combination with an engine crank case, a piston, acrank shaft, an air-stop ring consisting of an axiall movable collarrotatable with the cran shaft, a conduit adapted to be placed inperiodic communication with the interior of said crank case through thecollar, coincidently 'with the innermost position of said piston withrespect to the crank case, said conduit and collar being adapted todirect a fluid from the crank case, to a point external to the engine.

2. In an oil pump in combination with an engine crank case, a piston, acrank shaft, an air-stop plate consisting of a collar carried by, andmovable eiidwise of the crank shaft, a conduit external thereto, andvalve means constituted by said collai foreifecting the periodiccommunication of said conduit with the interior of said crank case,concurrently with each movement of said piston to a point near itsinnermost position with respect to the crank case, said conduit andcollar being adapted to effect a movement of oil by transfer of thecrank case pressure thereto. n

3. In an oil pump in combination with an engine crank case adapted for avarying pressure, a piston, a pressure relief channel, and rotatablemeans yieldably positioned along the crank shaft and serving the purposeof a closure for the crank case and for placing the channel incommunication with the crank case at predetermined crank case pressures,said channel being so situated as to produce a movement of oil at suchcrank case pressures.

In an oil pump in combination with an engine crank case in which thereexists a periodically varying pressure, a piston, a combined air-stopring and oil valve, yieldingly retained against a portion of said crankcase, a conduit outside of said crank case, and arranged to be placed inperiodic communication therewith through said ring, responsively to eachmovement of saidA piston intodisplacing relation toward said crank case,when said crank case pressure is greater than atmospheric.

5. In an oil pump in combination with an engine having a crank case inwhich there exists a periodically varying pressure, a piston, an oilconduit outside of said crank case, and means rotated by the engin-e forplacing said conduit in periodic communication with the crank case, whensaid crank case pressure is in excess of the pressure in aid oilconduit, said conduit being adapted thereby to effect a movement of oilfrom the crank case.

6. In an oil pump in combination with an engine having a crank caseadapted to hold a varying compression, a piston, a crank shaft, an oilconduit external to said crank case, a valve member attached forrotation with, and yieldably positioned along said crank shaft andclosing an aperture in said crank case, said member having an openingtherethrough, whereby said oil conduit and aperture register atpredetermined intervals, and are adapted to bypass crank case pressureto effect a movement of oil.

7. In an oil pump, an engine crank case adapted to hold a varyingcompression, a piston, an air-stop plate serving as a closuie for saidcrank case and arranged to servo as a movable valve member closing apressure by-pass aperture in said crank case, said member having aplurality of oppositel-y disposed openings, whereby said aperture andopenings register at predetermined intervals, and a conduit adapted toconnect an oil chamber with said aperture, to utilize crank casepressure for pumping oil external to said crank case.

8. In an oil pump in combination with an engine crank case having anopening for a shaft and shaft bearing, and an oil outlet opening in awall of the crank case, a piston, a crank shaft projecting through abearing opening in said crank case, an annular collar attached to saidcrank shaft and covering each of said openings, said collar having anoil opening therein, a member external to said crank case having a fluidpassageway therein adapted to register periodically with the oil openingin the annular collar, whereby crank case pressure is utilized to effecta movement of the oil.

9. In an oil pump in combination with the crank case of an engineemploying crank case compression, said crank case having a shaft openingtherein, a piston, a crankshaft, an oil drain conduit leading from saidcrank case, an oil outlet conduit arranged for movement intocommunication with said drain conduit, and means yieldably positionedalong the crankshaft, and forming said outlet conduit, said meansconstituting a closure for said shaft opening and adapted for placingsaid conduits in communication at predetermined crank case pressures,and adapted thereby to utilize such pressures to effect a movement ofthe oil.

l0. In an oil pump in combination with the crank case and crank shaft ofan internal combustion engine employing crank casev compression, thecrank case having an opening therein adapted to receive the crank shaft,a piston associated with the crank shaft, said crank case having an oiloutlet opening therein, an air-stop plate for said shaft opening,comprising a rotating collar, having a passage therein, said passagebeing positioned in angular coincidence with a crank of said crankshaft, said collar sealing said oil outlet opening excepting atpredetermined times When said passage registers with said outletopening, said collar and opening being adapted to by-pass said crankcase compression to cause a movement of an oil stream.

LEONARD AB. KAPP.

